35results about How to "Uniform concentration distribution" patented technology

The invention discloses an alkaline electrolytic cell pole frame polar plate with a turbulent flow structure and a manufacturing method. The alkaline electrolytic cell pole frame polar plate comprises a pole frame, an alkaline liquid inlet is formed in the bottom of the pole frame, and a hydrogen gas-liquid outlet and an oxygen gas-liquid outlet are formed in the top of the pole frame; the outer edge of a main pole plate body is fixedly connected to the inner ring of the pole frame, the upper surface of the main pole plate is lower than the upper surface of the pole frame so as to form a small electrolysis chamber, and the upper surface of the main pole plate body is sequentially provided with a first area, a second area and a third area from an alkali liquor inlet to a hydrogen gas-liquid outlet side; a plurality of rows of crescent-shaped protruding units A are arranged in the first area and the third area, and a row of semispherical protruding units B are arranged in the second area. According to the alkaline electrolytic cell pole frame pole plate with the turbulent flow effect and the effect of enabling the flow velocity distribution of liquid in the small electrolysis chamber to be uniform, the problems existing in the prior art are solved, the transverse flowing capacity of alkaline liquid in the small electrolysis chamber is enhanced, a liquid retention area is reduced, and meanwhile the bubble escaping capacity is enhanced.

The feeding mechanism of the 3D printing device comprises a liquid adding box, a C-opening isolation cover is integrally formed on the inner wall of one side of the liquid adding box, the interior of the liquid adding box is divided into a cavity and a resin groove through the C-opening isolation cover, the resin groove is used for containing photosensitive resin, a bottom plate is fixed in the cavity, and the bottom plate is used for containing the photosensitive resin; a liquid storage box is installed at the top end of the bottom plate, and a multi-layer H-shaped liquid injection structure used for forming a plurality of feeding points at different heights is installed on the inner wall of the liquid adding box. The photosensitive resin liquid simultaneously enters the resin tank from different directions, uniform concentration distribution of the resin liquid in the whole resin tank is guaranteed, the curing effect in the printing process is improved, the resin liquid enters the resin tank in a multi-point supply mode, a light source can more effectively irradiate each feeding point, and the printing efficiency is improved. Therefore, a faster photocuring process is realized, and the phenomena of insufficient illumination and incomplete curing reaction in some areas are avoided.

The invention relates to a polycarboxylate superplasticizer as well as a preparation method and application thereof. Comprising the following steps: mixing and dissolving IPEG and water, heating to a certain temperature, and adding an oxidizing agent to prepare a solution A; mixing a reducing agent and a chain transfer agent, and adding water to prepare a solution B; mixing an unsaturated acid monomer and a phosphate group-containing monomer, and adding water to prepare a solution C; and adding the solution B and the solution C into the solution A, stirring at a constant temperature until the reaction is completed, and cooling to room temperature to obtain the polycarboxylate superplasticizer, thereby completing the reaction. Compared with the prior art, the method has the advantages that the adsorption of the polycarboxylic acid water reducer to the micro powder is reduced, and the dispersion effect of the polycarboxylic acid water reducer is improved, so that the working performance of the high-micro-powder regenerated masonry mortar is improved, and the like.

The utility model relates to the technical field of electroplating, and discloses a waste liquid treatment device and an electroplating system. The waste liquid treatment device comprises an installation frame, a treatment box, an anode plate and a cathode plate, the treatment box is installed in the installation frame and suitable for being immersed in waste liquid, the treatment box comprises a box body with a cavity and an opening formed in the top of the box body, at least one side face of the box body is provided with a hollowed-out hole, and the hollowed-out hole is covered with an ionic membrane; the ionic membrane is used for separating water molecules and acid radical ions in the waste liquid, the anode plate is arranged in the cavity from the opening and is suitable for introducing the acid radical ions into the cavity, and the cathode plate is arranged in the waste liquid outside the treatment box and is electrically connected with the anode plate. Acid radical ions in the waste liquid enter the cavity to be concentrated and are effectively separated from water molecules in the waste liquid. Main pollutants in the separated waste liquid are removed, so that the separated waste liquid can be reused, the waste of water resources is reduced, the discharge amount of the waste liquid is reduced, and the treatment cost of the waste liquid is effectively saved.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The present invention discloses a chemical vapor deposition furnace, comprising a furnace body, a deposition chamber is arranged in the furnace body, the top of the deposition chamber is connected to a vacuum pipeline, the bottom of the deposition chamber is arranged on a crucible cover, a raw material crucible is arranged at the bottom of the crucible cover, and a gas introduction device is also arranged on the surface of the crucible cover corresponding to the deposition chamber; the gas introduction device comprises a plurality of gas boxes arranged in parallel, a plurality of gas nozzles are arranged on the gas box, two adjacent gas boxes are respectively connected to the raw material crucible and the mixed raw material gas inlet channel, the raw material crucible is also connected to the carrier gas inlet channel, and a gas distribution plate is arranged in the gas box. The present invention can significantly improve the uniformity of the raw material ratio of the deposition space, and it is easier to deposit and obtain a product with a larger area and uniform thickness.

The invention belongs to the technical field of high polymer materials, and discloses a device and a method for evaluating slow crack propagation resistance of a plastic pipe. The device comprises a point load loading mechanism, a surfactant solution storage tank, a sealable water tank, heating equipment, circulating pressurizing equipment, an electromagnetic valve and a throttling valve, and the point load loading mechanism comprises a point load tool, a collet bracket and an end socket. And the circulating pressurizing equipment is used for pressurizing the interior of the sample and realizing dynamic circulating flow of the surfactant solution between the sample and the surfactant solution storage tank. The device can conveniently and effectively evaluate the point load performance of the pipe, effectively simulate the real stress condition of the pipe, shorten the evaluation period, obtain reliable test data and provide technical basis for pipe construction.

The application discloses a kind of suitable for SCR denitration ammonia injection device and device, including ammonia injection pipe and the ammonia injection port of setting at ammonia injection pipe end, ammonia injection pipe includes ammonia main pipeline, branch pipeline and branch pipeline;Along ammonia main pipeline circumferential direction, equidistantly there are several branch pipelines;In branch pipeline, equidistantly and parallelly there are several vertical branch pipeline branch pipelines;Several branch pipelines are in the same plane, plane vertical branch pipeline;In branch pipeline, there is vertical plane ammonia injection port;Ammonia injection port gas outlet direction is same with ammonia main pipeline inner gas flow direction.The ammonia injection device suitable for SCR denitration designed in the application, including branch pipeline and branch pipeline, ammonia injection pipeline because each part branch pipe length is small, and the difference of branch pipeline diameter is not big, so it can reduce the flow resistance of ammonia in pipeline.

The invention discloses a high-concentration and low-concentration organic waste gas mixing device and method, the device comprises an inner cylinder structure and an outer cylinder structure, and an annular space is formed between the inner cylinder structure and the outer cylinder structure; the high-concentration waste gas distributors are arranged in a multi-stage manner, are positioned in the inner cylinder body, are communicated with the annular space and are used for uniformly and downwards distributing and horizontally distributing the high-concentration waste gas; each stage of high-concentration waste gas distributor consists of a plurality of tubular structures which are arranged at intervals in a staggered manner along the axial direction of the inner cylinder body; the low-concentration waste gas distributor is arranged at the low-concentration waste gas inlet at the bottom of the inner barrel, is positioned in the area on the other side of the first-stage high-concentration waste gas distributor, and is used for uniformly distributing low-concentration waste gas into the first-stage waste gas channel; the mixed waste gas distribution plates are arranged in a multi-stage mode and located in the inner barrel, each mixed waste gas distribution plate occupies the whole space of the cross section of the inner barrel, a half area of each mixed waste gas distribution plate is provided with holes, and the hole areas correspond to the high-concentration waste gas distributors in position; and the spiral blade is fixed at the top of each stage of high-concentration waste gas distributor and is positioned right below the opening area of the mixed waste gas distribution plate.

The application discloses a process for synthesizing polyether ether ketone by using compounded porous sodium carbonate, and relates to the technical field of polyether ether ketone.The raw materials such as hydroquinone and a salting agent are premixed under the protection of nitrogen, solid-phase materials and molten diphenyl sulfone are introduced into a reaction kettle to complete salting and polymerization, pulse stirring is combined, temperature control is realized in stages by using an intermittent method or a continuous method, and the salting agent is special compounded porous sodium carbonate.The application can improve salting and polymerization efficiency, shorten the synthesis time, narrow the molecular weight distribution of the product, improve the mechanical properties of the polyether ether ketone, and is suitable for intermittent / continuous industrial production.

The utility model relates to the technical field of watering and dust-settling devices, and provides a simple watering and dust-settling device for a construction site, which comprises a silicone dust-settling agent storage tank, a plurality of support plates fixedly arranged on the outer surface of the top of the silicone dust-settling agent storage tank, and two first rotating shafts rotatably connected to the opposite inner surfaces of the plurality of support plates, a suction pump pumps a dust falling agent in a silicone dust falling agent storage tank to a rotating pipe through a second conveying pipe and a first conveying pipe and sprays the dust falling agent outwards through a plurality of spraying heads for dust falling, an output shaft of a first motor drives a first rotating shaft and the rotating pipe to rotate, and the output shaft of the first motor drives a driving gear and a driven gear to rotate at the same time; and the transmission belt drives the first rotating shaft and the rotating pipe on the other side to rotate, and the angle and the spraying distance of the rotating pipe and the multiple spraying heads for spraying the dust falling agent outwards can be adjusted according to the dust falling spraying requirement of a construction site.

The invention belongs to the technical field of electrolysis devices, and particularly relates to a pole frame pole plate capable of uniformizing a flow field, an electrolytic bath and application thereof. The liquid distribution channels distributed in the radial shape are arranged on the electrode frame, and the effect of preliminarily dispersing the solution is achieved. The first guide plate and the second guide plate are arranged on the front surface of the polar plate near the solution outlet, so that the flow velocity of alkali liquor on two sides of the electrolysis chamber is increased, and the formation of flowing retention areas is reduced. The turbulent flow units are arranged in a hexagonal prism and hexagonal pyramid combined shape, so that the transverse and longitudinal distribution of the solution can be better balanced, the concentration distribution of the solution is more uniform, the use energy consumption of the electrolytic cell is reduced, and the energy utilization rate is improved. The connecting through hole is formed outside the pole frame, and the end plate and the pole frame pole plate are connected through the mounting positioning column and the connecting through hole, so that the pole frame pole plate, the gasket and the central axis of the end plate are positioned on the same parallel line in the mounting process, and a liquid inlet and a gas-liquid outlet keep good sealing performance.

The invention relates to a fully-mechanized excavation face dust fall effect evaluation method, and belongs to the technical field of coal mine operation. The method comprises the following steps: selecting a range 50m from the head of a fully-mechanized excavation face, and dividing the fully-mechanized excavation face into three areas according to a dust concentration rule: an area I with the dust concentration higher than 200mg / m < 3 >, and the length of the area I being l1; the dust concentration of the region II is 50-200mg / m < 3 >, and the length of the region II is 12; the dust concentration of the region III is lower than 50mg / m < 3 >, and the length of the region III is 13. The dust control effect of the fully-mechanized excavation face can be evaluated by establishing the evaluation relation between the dust control and removal effect and the regional distribution and the dust fall concentration. Therefore, monitoring and improvement of dust control measures of the fully-mechanized excavation face are facilitated, and cleanliness and safety of the working environment are improved.

The utility model provides a syrup concentration adjusting device, and relates to the technical field of syrup concentration adjusting, the syrup concentration adjusting device comprises a base, the base is fixedly provided with a stirring tank and a support, and the support is provided with a first stirring assembly and a second stirring assembly for stirring a solution in the stirring tank; the support is provided with a first driving motor used for driving the first stirring assembly to rotate and a driving assembly used for driving the second stirring assembly to rotate, and the rotating direction of the first stirring assembly is opposite to the rotating direction of the second stirring assembly. Compared with a single-direction stirring mode in the prior art, the device has the advantages that the sugar liquid can be more quickly dispersed into the whole solution system through stirring in different directions, so that the mixing is more sufficient, the uniform concentration distribution is ensured, and the blending quality of the sugar liquid is improved.

The present invention relates to the technical field of gas turbines, and provides a combustion chamber micro-mixing head, a gas turbine combustion chamber and a gas turbine. The combustion chamber micro-mixing head comprises: a honeycomb unit, a vortex generator and an injection channel, wherein a plurality of honeycomb holes are arranged in the honeycomb unit, and the honeycomb holes extend along the thickness of the honeycomb unit to form a flow channel in the honeycomb unit, and injection holes for injecting hydrogen are arranged on the side wall of the flow channel, and by arranging a vortex generator in the flow channel in the honeycomb hole, the disturbance of air in all directions is increased, and a flow vortex along the way is generated, and the air flow rate is reduced, so that hydrogen is dispersed into the air very quickly along the entire cross section, thereby reducing the emission of NOx of micro-mixing combustion, and at the same time preventing the problem of hydrogen flashback, enhancing the safety and service life of hydrogen combustion, and reducing carbon emissions and carbon management costs.

The utility model provides a kind of manganese sulfate solution adjusting device in electrolytic cell, comprising: electrolytic cell, buffer pool, transfer pool, sedimentation tank, the lower part of the buffer pool is connected with electrolytic cell side by first conveying pump, electrolytic cell other side is equipped with overflow pipe, overflow pipe is communicated with electrolytic cell by first connecting pipe, overflow pipe upper end is lower than the liquid level height in electrolytic cell, and overflow pipe upper part is equipped with overflow tank.The utility model is circulated between the manganese sulfate solution in electrolytic cell and buffer pool by first conveying pump by being equipped with buffer pool, to keep the concentration distribution of manganese sulfate solution in electrolytic cell uniform, by being equipped with on-line densimeter in buffer pool, using the principle that the density of manganese sulfate solution is also low when the concentration of manganese sulfate solution reduces, the concentration of manganese sulfate solution is detected, when lower than threshold value, higher concentration manganese sulfate solution can be supplemented, so that the manganese sulfate solution in electrolytic cell is kept in reasonable interval, and electrolytic efficiency is improved.

This invention provides an energy-saving gelatin-cooking device for donkey-hide gelatin production, relating to the technical field of donkey-hide gelatin production. It includes a support platform, with a main gelatin-cooking furnace fixedly connected to the top of the support platform, and a preheating tank fixedly connected to the top of the support platform. This invention recovers residual heat generated during gelatin-cooking by incorporating heat-conducting and gas-conducting components. The waste heat recovery tank absorbs the external temperature of the main gelatin-cooking furnace through a heat-conducting medium inside a spiral heat-conducting channel, and transfers it to the interior of the preheating tank via a heat-conducting circulation pipe and heat exchange coil, thereby preheating the water used for gelatin-cooking. Furthermore, the steam generated during gelatin-cooking can be preheated by hot gas delivery pipes and hot gas delivery coils, thereby reducing the workload of the main heating device, shortening the cooking cycle, and achieving dual recovery of waste heat, significantly reducing production energy consumption.

The invention provides a preparation method of 3-hydroxy propionaldehyde. The preparation method comprises the following steps: step S1, providing a reactor, the reactor comprising M fixed bed reactors, each fixed bed reactor being internally provided with N catalytic units which are communicated with each other, M being greater than or equal to 1 and less than or equal to N, M and N being not equal to 1 at the same time, each fixed bed reactor being provided with a feed port and a discharge port, and each catalytic unit being provided with an acrolein solution inlet; and S2, respectively introducing an acrolein solution into the catalytic unit from the acrolein solution inlets, simultaneously introducing water into the feed port of the fixed bed reactor, so that the acrolein solution and the water are subjected to an addition reaction in the catalytic unit, and then discharging a product of the addition reaction through the discharge port of the fixed bed reactor, thereby obtaining the 3-hydroxypropionaldehyde. The preparation method provided by the invention solves the problems of low conversion frequency and easy hardening of the catalyst for the acrolein hydration reaction.

An embodiment of the present invention provides a support device for an electrodeposited electrode. The electrode is tubular, and the support device includes: a plurality of support tubes, the support tubes are elastic, and the support tubes are configured to be able to contract radially inward to extend into the electrode, and support the electrode in the electrode by relying on a radially outward restoring force; a connector, a plurality of support tubes are fixedly connected to the connector, and the connector is used to connect to an external power source to power the electrode; a rotating assembly, which is connected to the connector, and the rotating assembly is used to drive the connector to rotate. The support device for an electrodeposited electrode provided by an embodiment of the present invention drives the connector to rotate through the rotating assembly, thereby driving the electrode on the connector to rotate, and when electrodepositing is performed, the cathode is located in the electrodeposited liquid, and the rotation of multiple cathodes can increase the disturbance of the electrodeposited liquid, making the concentration distribution in the electrodeposited liquid more uniform, thereby preventing the occurrence of concentration polarization.

A process for carbonitriding high-carbon chromium bearing steel to achieve high hardness and low residual austenite content is disclosed, comprising the following steps: S1, pre-cleaning to ensure the surface of the high-carbon chromium bearing steel is clean and free of oil; S2, pre-oxidation to ensure the surface of the high-carbon chromium bearing steel is free of water stains; S3, carbonitriding to improve the surface hardness and wear resistance of the high-carbon chromium bearing steel; S4, post-cleaning to ensure the surface of the high-carbon chromium bearing steel is clean and free of oil; S5, cold treatment to retain low residual austenite inside the high-carbon chromium bearing steel; S6, tempering to achieve high hardness of the high-carbon chromium bearing steel. The beneficial effects of this invention are: this process organically combines pre-oxidation, carbonitriding, cold treatment, and tempering to form a high-hardness, high-wear-resistant carbonitrided layer on the surface of the bearing steel, and the cold treatment effectively controls the residual austenite content, suppressing dimensional changes due to aging.

The invention discloses a high and low concentration organic waste gas mixing device and method, the device comprises an inner cylinder structure and an outer cylinder structure, the inner cylinder is sleeved in the outer cylinder, and an annular space is formed between the inner cylinder and the outer cylinder; the high-concentration waste gas distributors are arranged in a multi-stage manner, are positioned in the inner cylinder body, are communicated with the annular space, and are used for receiving the high-concentration waste gas in the annular space and uniformly distributing the high-concentration waste gas downwards; the high-concentration waste gas distributors occupy half of the space of the cross section of the inner cylinder and are arranged at intervals in a staggered manner along the axial direction of the inner cylinder; the low-concentration waste gas distributor is arranged at a low-concentration waste gas inlet in the bottom of the inner barrel, is positioned under the first-stage high-concentration waste gas distributor and is used for uniformly and upwards distributing low-concentration waste gas; and the mixed waste gas distribution plates are arranged in a multi-stage mode and located in the inner cylinder, each mixed waste gas distribution plate occupies half of the space of the cross section of the inner cylinder and is arranged in a staggered mode at intervals in the axial direction of the inner cylinder, and the arrangement mode is opposite to that of the high-concentration waste gas distributor.

A substrate processing method is disclosed. In the substrate processing method, a cleaning process is performed at a first temperature to remove a portion of an accumulation layer deposited in a chamber by a deposition process (step 1). A deposition process is performed on a plurality of substrates located in the chamber at the first temperature (step 2). Steps 1 and 2 are performed alternately and repeatedly.

The application relates to the technical field of performance evaluation of a biological aerosol sampler, and provides a biological aerosol sampler performance evaluation method, which comprises the following steps: environment construction: adjusting and maintaining the temperature, humidity, air pressure and air cleanliness in a calibration cabin to a preset target range; aerosol generation and homogenization: generating standard aerosols containing a target tracer in the calibration cabin, and mixing the air in the cabin to form a test aerosol environment with uniform spatial concentration distribution in a sampling area; dynamic sampling: making the detected sampler and a comparative sampler sample at multiple different spatial points in the calibration cabin; data comparison and analysis: performing performance calibration on the detected sampler according to the sampling data of the detected sampler and the comparative sampler. The environment conditions highly close to actual application scenarios are constructed, and the comprehensive performance of the biological aerosol sampler can be scientifically, systematically and quantitatively evaluated and calibrated.

The invention discloses an electrolytic bath liquid level adjusting device and method, and belongs to the technical field of electrolytic baths. An electrolytic bath liquid level adjusting device comprises an electrolytic bath box body and an observation window arranged on the electrolytic bath box body, a floating barrel is arranged in the electrolytic bath box body, and a corresponding scraper blade is attached to the face, located in the electrolytic bath box body, of the observation window. The processing element is used for driving the scraping plate to scrape along the inner surface of the observation window; according to the electrolytic bath liquid level adjusting device, the height of electrolyte in an electrolytic bath is reduced, a floating barrel automatically moves downwards, the floating barrel drives a first sliding block to move downwards through a connecting plate, the first sliding block moves downwards and drives a pulling block to move downwards together, the pulling block pulls a pull rope to move downwards, and the pull rope guides under the action of a guide wheel and pulls a mounting lug; and the scraping plate horizontally slides under the guidance of the first guide rod so as to scrape off electrolyte, particulate matters and the like attached to the observation window.

The invention relates to the technical field of magnesium nitrate production, in particular to a granulation device for magnesium nitrate production, which comprises a granulation box, a feed port I, a discharge port, a storage box and a feed port II, the feed port I is mounted at the upper end of the right side of the granulation box, the discharge port is connected to the right side of the lower end of the granulation box, and the storage box is arranged at the left side of the granulation box. The second feeding port is connected to the top of the storage box, a processing device is arranged in the granulation box, and the processing device comprises a stirring unit, a feeding unit, a wall scraping unit and a drying unit. According to the granulation device for magnesium nitrate production, a stirring unit is arranged, a first motor is started to drive a first stirring rod to rotate, a support is driven to rotate when the first stirring rod rotates, meanwhile, a transmission gear is meshed with a fixed gear, the transmission gear drives a second stirring rod to rotate, and meanwhile the second stirring rod revolves around the fixed gear; magnesium nitrate solutions in all positions in the granulation box are stirred, so that the concentration distribution is uniform, and the granulation quality is improved.

The invention relates to the technical field of petrochemical equipment, in particular to a premixing device, a low-nitrogen burner and a ground torch, which comprises a fan, a first pipeline, a second pipeline and a third pipeline, the first pipeline, the second pipeline and the third pipeline are sequentially communicated, the first pipeline is a straight pipeline, and an outlet of the fan is connected with one end of the first pipeline; a spoiler is fixedly arranged at an outlet of the fan; the pipe wall of one side of the first pipeline is connected with an air equalizing pipe in a penetrating manner; the second pipeline comprises a bent section and a straight section; and the third pipeline is a rotary body pipeline. The premixing uniformity of combustible gas and air can be effectively improved, the concentration distribution of the combustible gas and the air in mixed gas is more uniform, combustion is more sufficient and stable, and meanwhile the service life of the combustion head can be prolonged through the uniform temperature field.

The invention discloses a high and low concentration organic waste gas mixing device and method, the device comprises an inner cylinder structure and an outer cylinder structure, the inner cylinder is sleeved in the outer cylinder, and an annular space is formed between the inner cylinder and the outer cylinder; the high-concentration waste gas distributors are arranged in a multi-stage manner, are positioned in the inner cylinder body, are communicated with the annular space, and are used for receiving the high-concentration waste gas in the annular space and uniformly distributing the high-concentration waste gas downwards and horizontally; each stage of high-concentration waste gas distributor consists of a plurality of tubular structures which are arranged at intervals in a staggered manner along the axial direction of the inner cylinder body; the low-concentration waste gas distributor is arranged at a low-concentration waste gas inlet in the bottom of the inner barrel, is positioned under the first-stage high-concentration waste gas distributor and is used for uniformly and upwards distributing low-concentration waste gas; and the mixed waste gas distribution plates are arranged in a multi-stage mode and located in the inner barrel, each mixed waste gas distribution plate occupies the whole space of the cross section of the inner barrel, a half area of the mixed waste gas distribution plate is provided with holes, and the hole areas correspond to the high-concentration waste gas distributors in position.

The utility model belongs to the technical field of foot sole disinfection, and particularly relates to an automatic chlorine adding device of a small foot soaking pool, which comprises a protective cylinder and a through hole, the through hole penetrates through the bottom of an inner cavity of the protective cylinder, a submersible pump is arranged in the inner cavity of the protective cylinder, and a liquid discharge end of the submersible pump is positioned on the top surface of the submersible pump. The liquid discharge end of the submersible pump is connected with a jet device, and the side wall of the jet device is connected with a connecting pipe; through matching of the submersible pump and the jet device, chlorine water and water in the foot soaking pool can be mixed, a certain impact force is generated when the liquid discharging pipe discharges the mixed liquid, the chlorine water mixed liquid can be rapidly dispersed in the foot soaking pool, the concentration distribution of chlorine water in the foot soaking pool is more uniform, the timing controller can semi-automatically control the submersible pump to be automatically started and stopped, and the operation is simple and convenient. And the ORP probe is used for feedback to realize online control, so that automatic chlorination of the foot soaking pool is realized, and the foot soaking pool can be ensured to have a better disinfection effect on shoes.

The application discloses a water-absorbing core with double-gradient water-absorbing layers and a sanitary product. The water-absorbing core is provided with at least four layers of water-absorbing layers arranged in a stepped manner from top to bottom in the main body, and each water-absorbing layer is distributed with polymer water-absorbing resin; the cross-sectional area of each water-absorbing layer increases layer by layer from the uppermost layer to the lowermost layer; the distribution density of the polymer water-absorbing resin decreases layer by layer from the uppermost layer to the lowermost layer, forming a double-gradient structure of area and density. Preferably, each water-absorbing layer except the lowermost layer is elliptical, the lowermost layer is rectangular, and each layer is generally located at the same center. The layers are connected by hot-melt fibers or spraying latex. Through the double-gradient synergistic effect, the concentration of the polymer water-absorbing resin is smoothly transitioned from the center of the core to the periphery, effectively avoiding the problems of liquid diffusion obstruction and local supersaturation caused by the concentration mutation boundary in the existing two-layer structure, improving the overall utilization rate of the polymer water-absorbing resin, and improving the absorption and anti-back seepage performance under the condition of multiple liquid loading.

The utility model discloses a traffic sign line marking device for roads and bridges, which comprises a shell, one side of the shell is provided with a ground processing mechanism, the ground processing mechanism comprises a dust collection head, the top of the dust collection head penetrates to the inner cavity of the shell, the left side of the dust collection head is provided with a brush rod, and the left side of the brush rod is provided with a brush rod. A connecting block is fixedly connected to the top of the brush rod, a connecting frame is fixedly connected to one side of the connecting block, a box body is fixedly connected to the middle axis of the top of the shell, a fan communicates with the left side of the box body, and an air suction pipe communicates with the left side of the fan. According to the traffic sign line marking device for the roads and the bridges, the paint spraying mechanism is arranged, a heating column and a pump machine are controlled to work through a PLC, materials are heated through the heating column, meanwhile, a crankshaft can drive a stirring rod to rotate and stir the materials, so that the concentration distribution of the materials is uniform, and then the materials are pumped out through a material pumping pipe; and the material is sprayed to the pavement through the nozzle.